Naslund Chapter 1 Analysis
2022-12-08
Chapter 1 Sampling scheme
We sampled 4 sites over at least one 24 hr period. We installed 25 ebullition traps across 5 transects in each impoundment. Every 3 hours, we recorded the volume of gas accumulated in each ebullition trap and took a diffusive flux measurement immediately adjacent to 10 if the ebullition traps across the impoundment. To determine impoundment area, I digitized the impoundments using high resolution (0.5 ft) orthoimagery captured during the leaf off period. Pick has a beaver dam on the inlet stream and I delineated only to the beaver dam.
| Site | Area (km2) | Max Depth (m) | Mean Depth (m) | Residence Time | Dates Sampled |
|---|---|---|---|---|---|
| Deans | 0.0041 | 3.52 | 2.03 | 8/16/22 - 8/17/22 8/30/22 - 8/31/22 |
|
| Sister 3 | 0.0012 | 2.27 | 1.25 | 8/22/22 - 8/23/22 | |
| Catfish | 0.0018 | 1.98 | 0.80 | 9/6/22 - 9/7/22 9/18/22 - 9/19/22 |
|
| Pick | 0.0077 | 3.80 | 1.58 | 8/22/22 - 8/23/22 |
1.1 Dissolved oxygen
We recorded dissolved oxygen every 15 minutes 0.25 m below the surface in every impoundment. From 6/20/22 to 7/13/22, we also recorded dissolved oxygen 0.1m from the bottom of Pick in the deepest location in the impoundment. Because dissolved oxygen was consistently 0 mg/L, we reallocated our oxygen sensors and installed both a top and bottom DO sensor in Sister 3.